I have 2 new installs of 2015 R3 and both of them don't show anything under the Recipient Statistic > Detailed analysis. I have an older 2015 install and it shows every day of the month and the count in the specific columns for each day.

In the new 2015 R3 install it looks like this -
Detailed analysis: January 2017
Day Opt-Ins Opt-Outs Bounces
Total: 0 0 0

And that's it, nothing else. Also the count is always zeros even if people are added/removed.